CN110891208A

CN110891208A - Loudspeaker box

Info

Publication number: CN110891208A
Application number: CN201911214843.0A
Authority: CN
Inventors: 李健; 吴军
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-03-17
Also published as: WO2021109200A1

Abstract

The invention provides a loudspeaker box which comprises a shell, a sound production monomer and a first cover plate, wherein the inner side of the shell extends to form a support wall for supporting the sound production monomer and a sound guide channel; the inner side of the shell extends to form a surrounding wall, the inner side of the surrounding wall extends to form a partition plate connected with the support wall in a protruding mode, the first cover plate covers the surrounding wall, and the surrounding wall, the first cover plate, the shell and the support wall jointly form an auxiliary sound cavity; the supporting wall is provided with a first through hole, the partition plate is accommodated in the auxiliary sound cavity and divides the auxiliary sound cavity into a first cavity and a second cavity, the partition plate is provided with a second through hole, and the first cavity is communicated with the front cavity through the first through hole; the second cavity is communicated with the first cavity through a second through hole. Compared with the related art, the loudspeaker box disclosed by the invention has excellent high-frequency acoustic performance and good hearing.

Description

Loudspeaker box

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of acoustoelectric, in particular to a loudspeaker box applied to portable electronic products.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker box for playing sound is widely applied to the current smart mobile devices.

The loudspeaker box of the related art comprises a shell with an accommodating space, a sounding single body accommodated in the accommodating space, a supporting wall and a surrounding wall formed by extending the inner side of the shell, and a cover plate covering the surrounding wall; the sound production unit is fixedly supported on the supporting wall and comprises a vibrating diaphragm for vibrating and producing sound, the vibrating diaphragm and the shell are separated to form a front sound cavity, the shell is provided with a sound guide channel, and the front sound cavity is communicated with the outside through the sound guide channel and forms a front cavity together with the front sound cavity; the enclosure wall, the cover plate and the supporting wall jointly enclose an auxiliary sound cavity, the supporting wall is provided with a through hole penetrating through the supporting wall, the auxiliary sound cavity is communicated with the front cavity through the through hole to form a resonant cavity structure of the front cavity, and the resonant cavity structure is used for adjusting the high-frequency acoustic performance of the loudspeaker box.

However, in the related art, the resonant cavity structure of the speaker box is a single-cavity structure, and the adjusting effect on the high-frequency acoustic performance of the speaker box is limited, so that the high-frequency acoustic performance is limited, and high-frequency sound emitted by the speaker box is harsh and poor in hearing.

Therefore, there is a need to provide a new speaker box to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a loudspeaker box with excellent high-frequency acoustic performance and good hearing.

In order to achieve the above object, the present invention provides a speaker box, which includes a housing having an accommodating space and a sound generating unit accommodated in the accommodating space, wherein the inner side of the housing extends to form a supporting wall for supporting the sound generating unit, a sound guiding channel is further formed in the housing, the sound generating unit is fixedly supported on the supporting wall, the sound generating unit includes a vibrating diaphragm for vibrating and generating sound, the vibrating diaphragm divides the housing into a front sound cavity and a rear cavity, and the front sound cavity is communicated with the outside through the sound guiding channel and forms a front cavity together with the front sound cavity; the loudspeaker box also comprises a first cover plate, wherein the inner side of the shell extends to form a surrounding wall which is positioned on the outer side of the supporting wall, the inner side of the surrounding wall extends to form a partition plate connected with the supporting wall in a protruding and extending mode, the first cover plate is covered on the surrounding wall, and the surrounding wall, the first cover plate, the shell and the supporting wall jointly form an auxiliary sound cavity; the supporting wall is provided with a first through hole penetrating through the supporting wall, the partition plate is fixedly contained in the auxiliary sound cavity and divides the auxiliary sound cavity into a first cavity and a second cavity, the partition plate is provided with a second through hole penetrating through the partition plate, and the first cavity is communicated with the front cavity through the first through hole; the second cavity is communicated with the first cavity through the second through hole.

Preferably, the first cavity is communicated with the front sound cavity through the first through hole.

Preferably, the speaker box further includes an air-permeable damping member attached to the partition plate and completely covering the second through hole, and the second cavity is communicated with the first cavity through the air-permeable damping member.

Preferably, the surrounding wall includes a first wall and two second walls, the first wall and the supporting wall are arranged at an interval, the two second walls are respectively formed by extending the first wall in a direction approaching the supporting wall from two opposite sides, and the two second walls are respectively connected to the supporting wall; the partition plate extends from the first wall in a direction close to the support wall and is connected to the support wall.

Preferably, the loudspeaker box further comprises a second cover plate, one side of the shell, which is far away from the surrounding wall, is recessed to form an accommodating groove communicated with the first cavity, and the second cover plate is covered on the accommodating groove and arranged opposite to the partition plate at intervals; the supporting wall, the surrounding wall, the partition plate and the second cover plate jointly enclose the first cavity, and the supporting wall, the surrounding wall, the partition plate and the first cover plate jointly enclose the second cavity.

Preferably, the casing includes an upper cover and a lower cover covering the upper cover and enclosing the accommodating space together, the supporting wall and the surrounding wall are both formed on the upper cover, the accommodating groove is formed by the upper cover being recessed on a side away from the surrounding wall, and the sound generating unit is fixedly supported on the supporting wall and forms the front sound cavity with the upper cover at an interval.

Preferably, the sounding monomer is fixed on the supporting wall through glue bonding, the joint of the first cover plate and the surrounding wall is sealed by glue, and the joint of the second cover plate and the upper cover is sealed by glue.

Preferably, the first cover plate and the second cover plate are both made of PET material.

Compared with the prior art, the loudspeaker box has the advantages that the first cover plate, the shell and the supporting wall jointly enclose an auxiliary sound cavity, and the partition plate is fixedly contained in the auxiliary sound cavity and divides the auxiliary sound cavity into the first cavity and the second cavity; the supporting wall is provided with a first through hole penetrating through the supporting wall, the partition plate is provided with a second through hole penetrating through the partition plate, and the first cavity is communicated with the front cavity through the first through hole; the second cavity is communicated with the first cavity through a second through hole; in the structure, the first cavity and the second cavity are jointly arranged, so that the loudspeaker box forms a resonant cavity structure with a double-cavity structure, the Q value (quality factor value) and the sensitivity of a high-frequency resonant peak of the loudspeaker box are effectively reduced through the resonant cavity structure, the high-frequency acoustic performance of the loudspeaker box is better, and the listening experience of a user on high-frequency sound is improved.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of a speaker box according to the present invention;

FIG. 2 is an exploded perspective view of a portion of the speaker cabinet of the present invention;

FIG. 3 is an exploded view of another angle of the speaker box of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is an enlarged view of the portion indicated by C in FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 7 is an enlarged view of the portion indicated at D in FIG. 6;

FIG. 8 is a graph of a frequency response of a related art loudspeaker enclosure;

fig. 9 is a graph of the frequency response of the loudspeaker enclosure of the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a speaker box 100, which includes a housing 1, a sound generating unit 2, a first cover plate 3, a second cover plate 4 and a partition plate 5.

The casing 1 has a receiving space 10, the inner side of the casing 1 extends to form a supporting wall 111 and a surrounding wall 112 for supporting the sound generating unit 2, and the surrounding wall 112 is located outside the supporting wall 111 and abuts against the outer side wall of the supporting wall 111.

It should be noted that the housing 1 may be an integral structure or a separate structure, for example, in the present embodiment, the housing 1 includes an upper cover 11 and a lower cover 12 covering the upper cover 11 and enclosing the accommodating space 10 together.

The sound generating unit 2 is accommodated in the accommodating space 10 of the housing 1, and the accommodating space 10 is divided into a front sound cavity 1101 and a rear cavity 102 by the sound generating unit 2.

In this embodiment, the sound generating unit 1 is fixedly supported on the supporting wall 111 and forms the front sound cavity 1101 at an interval with the upper cover 11, the sound generating unit 2 includes a diaphragm 21 for vibrating and generating sound, and the diaphragm 21 divides the accommodating space 10 into the front sound cavity 1101 and the rear cavity 102. Specifically, the diaphragm 21 and the upper cover 11 are arranged at intervals and jointly enclose the front acoustic cavity 1101; the diaphragm 21, the upper cover 11 and the lower cover 12 together enclose the rear cavity 102. The back volume 102 is used to improve the low frequency acoustic performance of the loudspeaker enclosure 100.

The housing 1 is further formed with a sound guide channel 1102, and the sound guide channel 1102 connects the front sound cavity 1101 with the outside and forms a front cavity 101 together with the front sound cavity 1101. The sound guiding channel 1102 is used to form the front cavity 101 into a side sound emitting structure.

The first cover plate 3 is completely covered on the surrounding wall 112, the first cover plate 3, the housing 1 and the supporting wall 111 together surround an auxiliary acoustic cavity 103, the supporting wall 111 is provided with a first through hole 1110 penetrating through the supporting wall, and the auxiliary acoustic cavity 103 is communicated with the front cavity 101 through the first through hole 1110 to form a resonant cavity structure of the front cavity 101, so as to improve high-frequency acoustic performance.

The inner side of the surrounding wall 112 protrudes and extends to form a partition plate 5 connected with the supporting wall 111, the partition plate 5 is fixedly accommodated in the auxiliary sound chamber 103 and divides the auxiliary sound chamber 103 into a first chamber 1031 and a second chamber 1032, and the first chamber 1031 is communicated with the front chamber 101 through the first through hole 1110; the partition plate 5 is provided with a second through hole 50 penetrating therethrough, and the second chamber 1032 is communicated with the first chamber 1031 through the second through hole 50.

Further, the partition plate 5 and the surrounding wall 112 may be integrated or separated, for example, in the present embodiment, the surrounding wall 112 includes a first wall 1121 and two second walls 1122, the first wall 1121 is disposed at a distance from the support wall 111, the two second walls 1122 are respectively formed by extending from opposite sides of the first wall 1121 in a direction approaching the support wall 111, and the two second walls 1122 are respectively connected to the support wall 111; the partition plate 5 extends from the first wall 1121 to a direction close to the support wall 111 and is connected to the support wall 111, even if the partition plate 5 and the surrounding wall 112 are integrated, separate assembly of the partition plate 5 is not required, and the assembly process is simplified; of course, the partition plate can also be an independent plate structure, at the moment, the inner side of the enclosure wall is hollow, and during assembly, the partition plate needs to be fixed on the inner side of the enclosure wall so as to realize the division of the auxiliary sound cavity.

Further, a receiving groove 110 communicating with the first chamber 1031 is formed by recessing a side of the housing 1 away from the surrounding wall 112, more specifically, the receiving groove 110 is formed by recessing a side of the upper cover 11 away from the surrounding wall 112, and the second cover plate 4 is disposed in the receiving groove 110 and is opposite to the partition plate 5 at an interval.

The first chamber 1031 is defined by the supporting wall 111, the surrounding wall 112, the partition plate 5, and the second cover plate 4, and the second chamber 1032 is defined by the supporting wall 111, the surrounding wall 112, the partition plate 5, and the first cover plate 3.

In the above structure, the first chamber 1031 and the second chamber 1032 are commonly disposed, so that the speaker box 100 forms a resonant cavity structure having a dual-cavity structure, the structure effectively increases the cavity volume of the front cavity 101, and improves the high-frequency acoustic performance, and meanwhile, the resonant cavity structure of the dual-cavity structure more effectively reduces the Q value (quality factor value) and the sensitivity of the high-frequency formant of the speaker box 100, so that the high-frequency acoustic performance of the speaker box 100 is better, and the listening experience of a user on high-frequency sound is improved.

It should be noted that the first chamber 1031 is communicated with the front sound chamber 1101 through the first through hole 1110. Of course, it is also possible that the first chamber communicates with the sound guiding channel via the first through hole, as is the principle.

Preferably, the speaker box 100 further includes an air-permeable damping member 6 attached to the partition plate 5 and completely covering the second through hole 50, and the second chamber 1032 is communicated with the first chamber 1031 through the air-permeable damping member 6, so that damping between the first chamber 1031 and the second chamber 1032 is effectively increased, and high-frequency acoustic performance is further improved.

Specifically, the sounding unit 2 is fixed on the supporting wall 111 through glue bonding, the joint of the first cover plate 3 and the surrounding wall 112 is glued and sealed, and the joint of the second cover plate 4 and the upper cover 11 is glued and sealed, so that the tightness of the front sound cavity 1101, the first cavity 1031 and the second cavity 1032 is improved, and the high-frequency acoustic performance is better.

Preferably, the first cover plate 3 and the second cover plate 4 are both made of a soft material PET material, which can effectively reduce the resonant peak and distortion of the resonant cavity, and further make the high-frequency acoustic performance better.

Preferably, there may be one or more of the surrounding walls 112 and the arrangement positions thereof are various, and in this embodiment, there is one surrounding wall 112. According to the needs that acoustic performance adjusted, can correspond the first apron of complex, second apron and the number of division board through adding the number of bounding wall and with the bounding wall, form a plurality of resonant cavities that have two cavitys and increase the cavity volume of front chamber, or directly through the position that the adjustment bounding wall set up, and then improve high-frequency acoustic performance better.

Referring to fig. 8, a frequency response curve diagram of a speaker box with a single-cavity resonant cavity structure in the related art shows that when the operating frequency of the speaker box in the related art is at a level of 5500 to 6000Hz, the sound pressure level of the speaker box is greater than 100 dB. When it reaches 5700Hz, the sound pressure level of the loudspeaker box reaches the peak value, which is larger than 100.5 dB. According to chart analysis, when the working frequency is 5500-6000 Hz, the sound pressure level of the loudspeaker box is high, the actual listening feeling high frequency is harsh, particularly, the lip tooth sound is sharp, and the high-frequency acoustic performance is poor.

Referring to fig. 9, the frequency response curve of the speaker box according to the present invention has a peak value of less than 100 dB. In conclusion, the loudspeaker box effectively improves high-frequency acoustic performance.

Please refer to fig. 6, which is a graph showing frequency response of the speaker box according to the present invention by adjusting the number and the positions of the resonant cavities. When the working frequency is at the level of 4000-6000 Hz, the sound pressure levels corresponding to the frequency response curves of the speaker boxes of the three different embodiments of the speaker box of the invention are reduced and have peak values, compared with the frequency response curves of the speaker box of the related art shown in fig. 4. The peak value of the frequency response curve of the loudspeaker box of one embodiment is the highest, and when the working frequency is 5000Hz, the sound pressure level corresponding to the peak value is less than 102 dB. In conclusion, the loudspeaker box effectively improves high-frequency acoustic performance.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a loudspeaker box, its including have accommodating space the casing with accept in sound production monomer in the accommodating space, the inboard of casing extends to form and is used for supporting sound production monomer's support wall, just still be formed with the sound conduction passageway in the casing, sound production monomer fixed stay in the support wall, sound production monomer is including the vibrating diaphragm that is used for the vibration sound production, the vibrating diaphragm will preceding acoustic chamber and back chamber are separated into to the casing, the sound conduction passageway will preceding acoustic chamber with external intercommunication and with preceding acoustic chamber forms the front chamber jointly, a serial communication port, loudspeaker box still includes first apron, the inboard of casing extends the leg that forms and be located the support wall outside, the inboard protrusion of leg extend form with the division board that the support wall is connected, first apron lid is located the leg, the leg first apron, The shell and the supporting wall jointly enclose an auxiliary sound cavity; the supporting wall is provided with a first through hole penetrating through the supporting wall, the partition plate is fixedly contained in the auxiliary sound cavity and divides the auxiliary sound cavity into a first cavity and a second cavity, the partition plate is provided with a second through hole penetrating through the partition plate, and the first cavity is communicated with the front cavity through the first through hole; the second cavity is communicated with the first cavity through the second through hole.

2. A loudspeaker enclosure according to claim 1, wherein the first chamber communicates with the front acoustic chamber through the first through-hole.

3. The loudspeaker enclosure of claim 1, further comprising an air-permeable damper attached to the divider plate and completely covering the second through-hole, the second chamber communicating with the first chamber through the air-permeable damper.

4. A loudspeaker enclosure according to claim 1, wherein the enclosure wall comprises a first wall and two second walls, the first wall being spaced from the support wall, the two second walls each being formed by extending from opposite sides of the first wall in a direction towards the support wall, and each being connected to the support wall; the partition plate extends from the first wall in a direction close to the support wall and is connected to the support wall.

5. The speaker box as claimed in claim 4, further comprising a second cover plate, wherein a side of the housing away from the enclosure wall is recessed to form a receiving slot communicating with the first cavity, and the second cover plate is covered on the receiving slot and is spaced from the partition plate; the supporting wall, the surrounding wall, the partition plate and the second cover plate jointly enclose the first cavity, and the supporting wall, the surrounding wall, the partition plate and the first cover plate jointly enclose the second cavity.

6. The speaker box as claimed in claim 5, wherein the housing includes an upper cover and a lower cover covering the upper cover and enclosing the receiving space, the supporting wall and the surrounding wall are formed on the upper cover, the receiving slot is formed by a recess on a side of the upper cover away from the surrounding wall, and the sound generating unit is fixed on the supporting wall and spaced from the upper cover to form the front sound cavity.

7. The loudspeaker box of claim 6, wherein the sound generating unit is fixed to the support wall by gluing, the joint of the first cover plate and the surrounding wall is sealed by gluing, and the joint of the second cover plate and the upper cover is sealed by gluing.

8. A loudspeaker enclosure according to claim 5, wherein the first and second cover panels are both of PET material.